From Blood on the Clocktower Wiki

Icon mathematician.png Information

Type Townsfolk
Artist John Grist

"Any consistent formal system x, within which a certain amount of elementary arithmetic can be carried out is incomplete; that is, there are statements of the language of x which can neither be proved nor disproved in x. Ergo, you are drunk."

Appears in Logo sects and violets.png

Cult of the Clocktower Episode by Andrew Nathenson

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"Each night, you learn how many players' abilities worked abnormally (since dawn) due to another character's ability."

The Mathematician knows how many things have gone wrong since dawn today.

  • When an ability does not work in the intended way due to another character’s interference, the Mathematician will learn that it happened. They’ll learn that something went wrong if a piece of information was false but was supposed to be true, or if an ability should have worked but didn’t, due to another character.
  • The Mathematician does not learn which players this happened to, only how many times it happened.
  • The Mathematician does not detect their own ability failing.
  • The Mathematician does not detect drunkenness or poisoning itself, but does detect when drunk or poisoned players’ abilities did not work as intended. The Recluse registering as evil to the Chef, and the poisoned Soldier dying from the Imp’s attack, would each be detected. The poisoned Empath getting true information would not.

How to Run

Each time a character’s ability works abnormally due to another character’s ability, mark them with an ABNORMAL reminder.

Each night, wake the Mathematician. Show fingers (0, 1, 2, etc.) equaling the number of characters with ABNORMAL reminders. Put the Mathematician to sleep. Remove all ABNORMAL reminders.


The poisoned Oracle learns that two dead players are evil, when three dead players are actually evil. All other character abilities work normally. Later that night, the Mathematician learns a "1.”.

The poisoned Snake Charmer chooses a Townsfolk player, and nothing happens. The drunk Juggler gets correct information. The Savant learns two pieces of true information. Later that night, the Mathematician learns a "1" because the Snake Charmer and Juggler's abilities worked as normal, whilst one of the Savant's facts was true when it should have been false.

A Vortox is in play. Five good players got false information. The Witch is drunk, and when their cursed player nominated, nothing happened. Even though six abilities worked abnormally, the Mathematician learns a "4" due to the Vortox's ability.

Tips & Tricks

  • Your information is valuable, but only if you know what the rest of the town is doing. Get chatty with your fellow players and find out what their information is - figuring out who has an ability that isn't working correctly will help out the good team a lot. Characters like the Clockmaker, Flowergirl, Seamstress and Oracle (among others) will need your help making sure their information should be acted upon!
  • Pay attention to game changes that would affect your data, and be wary if your data suddenly changes. If a recent executee is claiming to be the Sweetheart, your number might increment that evening. Alternatively, if you're suddenly getting a '2' when you were previously getting a '0', you can be suspicious that a Pit-Hag just created a No Dashii.
  • Make sure to check with your Storyteller on what sort of ability malfunctions that you're picking up on. In Sects & Violets, you typically detect when good characters have their ability altered due to evil characters, like the No Dashii and Vortox. However, you will also detect character abilities not working as intended due to the Sweetheart after death, or the Philosopher duplicating an in-play character, and a poisoned Snake Charmer trying to use their ability on the Demon, but nothing happening.
  • Beware of the Vortox! Just like everyone else, all of your information will be false. If you are getting a low number, but it seems like a lot of Townsfolk are getting misinformation, you can suspect that this is in play. In particular, getting a '0' when others appear to be getting bad information is a great tell that you are poisoned OR a Vortox is in town.
  • Getting a read of '0' is fantastic, as it means that nobody got bad information or had their ability not work correctly. Everyone should be able to trust their info for that day and night.
  • Getting a read of '1' is also fantastic - this means only one ability didn't work as intended, and if you can figure out who that is, everyone else can trust their information is reliable for that day and night.
  • If you're getting a read of '2' or more, your town might be in trouble. This is a very good sign that multiple sources of poisoning or ability malfunctions are afoot in the town... or that maybe you're the one who is poisoned.
  • Unlike other townsfolk, the Mathematician doesn't need to be shy in coming out. Not only is your information most useful when shared, but even one night of it is incredibly powerful when it comes to helping the town. Compared to a Flowergirl or a Juggler you're also just not as much of a threat.

Bluffing as the Mathematician

When bluffing as the Mathematician, there are a few things you should keep in mind:

  • Keep your numbers small. Telling the group a 4, 3, or even a 2 can look suspicious. Most of the time, real, legitimate Mathematician (those with a degree!), usually get a 0 or a 1 each night.
  • Be thoughtful when it comes time to give your information for the first night of the game. Less characters act on the first night, so giving a 0 is safest. Sometimes, a 1 is doable.
  • Be consistent with your information. If you have given 2 for each night so far, keep telling the group a 2. If you have told the group that 0 player's abilities have gone wrong, then switching suddenly to a 1 will bring a lot of attention on you. Be prepared. Reducing the number that you give over time is much more believable than increasing it - as players die, the number of malfunctioning abilities would gradually be getting less and less.
  • Switch your information up when an obvious change would indicate that it should. For example, if a Sweetheart dies, or if a Philosopher becomes an in-play character, changing your information up would indicate that you are indeed the Mathematician, and that the Sweetheart and Philosopher are also telling the truth.
  • If you know the type of Demon that is in play, give information that is consistent with the Demon. This makes you look good. For example, if you know a Vortox is in play (and you believe the good team has, or will, figure it out), then giving obviously inaccurate information seems reasonable. Or, if you know a Fang Gu is in play, (and you believe the good team has, or will, figure it out), then give information that implies that good abilities are working normally.
  • If you know the type of Demon that is in play, but you do not believe that the good team will figure it out, then give information that conflicts with this Demon type. If you can make the good team believe that a different Demon is in-play, then they will be very confused. For example, if a Vigormortis is in play, you can keep giving a 1 or a 2 as your information, giving the impression that a No Dashii is in play instead.
  • As a fake Mathematician, you are particularly suited to supporting the bluffs of other evil players. If they are claiming to be a good character that is suspicious that their ability malfunctioned yesterday, then give a 1 (or more) to make their bluff look more legitimate.
  • If you are a Minion, and trying to get yourself executed late in the game, you can do so easily as the Mathematician. Tell the group you received either a 0 or a 1 at a time where it would be obviously illogical to do so, and the good team will be hunting for you - but not the Demon - once they figure it out.